提交 | 用户 | age
|
bfc108
|
1 |
/**
|
Q |
2 |
******************************************************************************
|
|
3 |
* @file stm32f0xx_ll_rcc.c
|
|
4 |
* @author MCD Application Team
|
|
5 |
* @brief RCC LL module driver.
|
|
6 |
******************************************************************************
|
|
7 |
* @attention
|
|
8 |
*
|
|
9 |
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
|
|
10 |
*
|
|
11 |
* Redistribution and use in source and binary forms, with or without modification,
|
|
12 |
* are permitted provided that the following conditions are met:
|
|
13 |
* 1. Redistributions of source code must retain the above copyright notice,
|
|
14 |
* this list of conditions and the following disclaimer.
|
|
15 |
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
16 |
* this list of conditions and the following disclaimer in the documentation
|
|
17 |
* and/or other materials provided with the distribution.
|
|
18 |
* 3. Neither the name of STMicroelectronics nor the names of its contributors
|
|
19 |
* may be used to endorse or promote products derived from this software
|
|
20 |
* without specific prior written permission.
|
|
21 |
*
|
|
22 |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
23 |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
24 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
25 |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
26 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
27 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
28 |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
29 |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
30 |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
31 |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
32 |
*
|
|
33 |
******************************************************************************
|
|
34 |
*/
|
|
35 |
#if defined(USE_FULL_LL_DRIVER)
|
|
36 |
|
|
37 |
/* Includes ------------------------------------------------------------------*/
|
|
38 |
#include "stm32f0xx_ll_rcc.h"
|
|
39 |
#ifdef USE_FULL_ASSERT
|
|
40 |
#include "stm32_assert.h"
|
|
41 |
#else
|
|
42 |
#define assert_param(expr) ((void)0U)
|
|
43 |
#endif /* USE_FULL_ASSERT */
|
|
44 |
/** @addtogroup STM32F0xx_LL_Driver
|
|
45 |
* @{
|
|
46 |
*/
|
|
47 |
|
|
48 |
#if defined(RCC)
|
|
49 |
|
|
50 |
/** @defgroup RCC_LL RCC
|
|
51 |
* @{
|
|
52 |
*/
|
|
53 |
|
|
54 |
/* Private types -------------------------------------------------------------*/
|
|
55 |
/* Private variables ---------------------------------------------------------*/
|
|
56 |
|
|
57 |
/* Private constants ---------------------------------------------------------*/
|
|
58 |
/* Private macros ------------------------------------------------------------*/
|
|
59 |
/** @addtogroup RCC_LL_Private_Macros
|
|
60 |
* @{
|
|
61 |
*/
|
|
62 |
#if defined(RCC_CFGR3_USART2SW) && defined(RCC_CFGR3_USART3SW)
|
|
63 |
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
|
|
64 |
|| ((__VALUE__) == LL_RCC_USART2_CLKSOURCE) \
|
|
65 |
|| ((__VALUE__) == LL_RCC_USART3_CLKSOURCE))
|
|
66 |
#elif defined(RCC_CFGR3_USART2SW) && !defined(RCC_CFGR3_USART3SW)
|
|
67 |
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
|
|
68 |
|| ((__VALUE__) == LL_RCC_USART2_CLKSOURCE))
|
|
69 |
#elif defined(RCC_CFGR3_USART3SW) && !defined(RCC_CFGR3_USART2SW)
|
|
70 |
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
|
|
71 |
|| ((__VALUE__) == LL_RCC_USART3_CLKSOURCE))
|
|
72 |
#else
|
|
73 |
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE))
|
|
74 |
#endif /* RCC_CFGR3_USART2SW && RCC_CFGR3_USART3SW */
|
|
75 |
|
|
76 |
#define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__) ((__VALUE__) == LL_RCC_I2C1_CLKSOURCE)
|
|
77 |
|
|
78 |
#if defined(USB)
|
|
79 |
#define IS_LL_RCC_USB_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USB_CLKSOURCE))
|
|
80 |
#endif /* USB */
|
|
81 |
|
|
82 |
#if defined(CEC)
|
|
83 |
#define IS_LL_RCC_CEC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_CEC_CLKSOURCE))
|
|
84 |
#endif /* CEC */
|
|
85 |
|
|
86 |
/**
|
|
87 |
* @}
|
|
88 |
*/
|
|
89 |
|
|
90 |
/* Private function prototypes -----------------------------------------------*/
|
|
91 |
/** @defgroup RCC_LL_Private_Functions RCC Private functions
|
|
92 |
* @{
|
|
93 |
*/
|
|
94 |
uint32_t RCC_GetSystemClockFreq(void);
|
|
95 |
uint32_t RCC_GetHCLKClockFreq(uint32_t SYSCLK_Frequency);
|
|
96 |
uint32_t RCC_GetPCLK1ClockFreq(uint32_t HCLK_Frequency);
|
|
97 |
uint32_t RCC_PLL_GetFreqDomain_SYS(void);
|
|
98 |
/**
|
|
99 |
* @}
|
|
100 |
*/
|
|
101 |
|
|
102 |
|
|
103 |
/* Exported functions --------------------------------------------------------*/
|
|
104 |
/** @addtogroup RCC_LL_Exported_Functions
|
|
105 |
* @{
|
|
106 |
*/
|
|
107 |
|
|
108 |
/** @addtogroup RCC_LL_EF_Init
|
|
109 |
* @{
|
|
110 |
*/
|
|
111 |
|
|
112 |
/**
|
|
113 |
* @brief Reset the RCC clock configuration to the default reset state.
|
|
114 |
* @note The default reset state of the clock configuration is given below:
|
|
115 |
* - HSI ON and used as system clock source
|
|
116 |
* - HSE and PLL OFF
|
|
117 |
* - AHB and APB1 prescaler set to 1.
|
|
118 |
* - CSS, MCO OFF
|
|
119 |
* - All interrupts disabled
|
|
120 |
* @note This function doesn't modify the configuration of the
|
|
121 |
* - Peripheral clocks
|
|
122 |
* - LSI, LSE and RTC clocks
|
|
123 |
* @retval An ErrorStatus enumeration value:
|
|
124 |
* - SUCCESS: RCC registers are de-initialized
|
|
125 |
* - ERROR: not applicable
|
|
126 |
*/
|
|
127 |
ErrorStatus LL_RCC_DeInit(void)
|
|
128 |
{
|
|
129 |
uint32_t vl_mask = 0U;
|
|
130 |
|
|
131 |
/* Set HSION bit */
|
|
132 |
LL_RCC_HSI_Enable();
|
|
133 |
|
|
134 |
/* Set HSITRIM bits to the reset value*/
|
|
135 |
LL_RCC_HSI_SetCalibTrimming(0x10U);
|
|
136 |
|
|
137 |
/* Reset SW, HPRE, PPRE and MCOSEL bits */
|
|
138 |
vl_mask = 0xFFFFFFFFU;
|
|
139 |
CLEAR_BIT(vl_mask, (RCC_CFGR_SW | RCC_CFGR_HPRE | RCC_CFGR_PPRE | RCC_CFGR_MCOSEL));
|
|
140 |
LL_RCC_WriteReg(CFGR, vl_mask);
|
|
141 |
|
|
142 |
/* Reset HSEON, CSSON, PLLON bits */
|
|
143 |
vl_mask = 0xFFFFFFFFU;
|
|
144 |
CLEAR_BIT(vl_mask, (RCC_CR_PLLON | RCC_CR_CSSON | RCC_CR_HSEON));
|
|
145 |
LL_RCC_WriteReg(CR, vl_mask);
|
|
146 |
|
|
147 |
/* Reset HSEBYP bit */
|
|
148 |
LL_RCC_HSE_DisableBypass();
|
|
149 |
|
|
150 |
/* Reset CFGR register */
|
|
151 |
LL_RCC_WriteReg(CFGR, 0x00000000U);
|
|
152 |
|
|
153 |
#if defined(RCC_HSI48_SUPPORT)
|
|
154 |
/* Reset CR2 register */
|
|
155 |
LL_RCC_WriteReg(CR2, 0x00000000U);
|
|
156 |
|
|
157 |
/* Disable HSI48 */
|
|
158 |
LL_RCC_HSI48_Disable();
|
|
159 |
|
|
160 |
#endif /*RCC_HSI48_SUPPORT*/
|
|
161 |
/* Set HSI14TRIM/HSI14ON/HSI14DIS bits to the reset value*/
|
|
162 |
LL_RCC_HSI14_SetCalibTrimming(0x10U);
|
|
163 |
LL_RCC_HSI14_Disable();
|
|
164 |
LL_RCC_HSI14_EnableADCControl();
|
|
165 |
|
|
166 |
/* Reset CFGR2 register */
|
|
167 |
LL_RCC_WriteReg(CFGR2, 0x00000000U);
|
|
168 |
|
|
169 |
/* Reset CFGR3 register */
|
|
170 |
LL_RCC_WriteReg(CFGR3, 0x00000000U);
|
|
171 |
|
|
172 |
/* Clear pending flags */
|
|
173 |
#if defined(RCC_HSI48_SUPPORT)
|
|
174 |
vl_mask = (LL_RCC_CIR_LSIRDYC | LL_RCC_CIR_LSERDYC | LL_RCC_CIR_HSIRDYC | LL_RCC_CIR_HSERDYC | LL_RCC_CIR_PLLRDYC | LL_RCC_CIR_HSI14RDYC | LL_RCC_CIR_HSI48RDYC | LL_RCC_CIR_CSSC);
|
|
175 |
#else
|
|
176 |
vl_mask = (LL_RCC_CIR_LSIRDYC | LL_RCC_CIR_LSERDYC | LL_RCC_CIR_HSIRDYC | LL_RCC_CIR_HSERDYC | LL_RCC_CIR_PLLRDYC | LL_RCC_CIR_HSI14RDYC | LL_RCC_CIR_CSSC);
|
|
177 |
#endif /* RCC_HSI48_SUPPORT */
|
|
178 |
SET_BIT(RCC->CIR, vl_mask);
|
|
179 |
|
|
180 |
/* Disable all interrupts */
|
|
181 |
LL_RCC_WriteReg(CIR, 0x00000000U);
|
|
182 |
|
|
183 |
return SUCCESS;
|
|
184 |
}
|
|
185 |
|
|
186 |
/**
|
|
187 |
* @}
|
|
188 |
*/
|
|
189 |
|
|
190 |
/** @addtogroup RCC_LL_EF_Get_Freq
|
|
191 |
* @brief Return the frequencies of different on chip clocks; System, AHB and APB1 buses clocks
|
|
192 |
* and different peripheral clocks available on the device.
|
|
193 |
* @note If SYSCLK source is HSI, function returns values based on HSI_VALUE(**)
|
|
194 |
* @note If SYSCLK source is HSE, function returns values based on HSE_VALUE(***)
|
|
195 |
* @note If SYSCLK source is PLL, function returns values based on
|
|
196 |
* HSI_VALUE(**) or HSE_VALUE(***) multiplied/divided by the PLL factors.
|
|
197 |
* @note (**) HSI_VALUE is a defined constant but the real value may vary
|
|
198 |
* depending on the variations in voltage and temperature.
|
|
199 |
* @note (***) HSE_VALUE is a defined constant, user has to ensure that
|
|
200 |
* HSE_VALUE is same as the real frequency of the crystal used.
|
|
201 |
* Otherwise, this function may have wrong result.
|
|
202 |
* @note The result of this function could be incorrect when using fractional
|
|
203 |
* value for HSE crystal.
|
|
204 |
* @note This function can be used by the user application to compute the
|
|
205 |
* baud-rate for the communication peripherals or configure other parameters.
|
|
206 |
* @{
|
|
207 |
*/
|
|
208 |
|
|
209 |
/**
|
|
210 |
* @brief Return the frequencies of different on chip clocks; System, AHB and APB1 buses clocks
|
|
211 |
* @note Each time SYSCLK, HCLK and/or PCLK1 clock changes, this function
|
|
212 |
* must be called to update structure fields. Otherwise, any
|
|
213 |
* configuration based on this function will be incorrect.
|
|
214 |
* @param RCC_Clocks pointer to a @ref LL_RCC_ClocksTypeDef structure which will hold the clocks frequencies
|
|
215 |
* @retval None
|
|
216 |
*/
|
|
217 |
void LL_RCC_GetSystemClocksFreq(LL_RCC_ClocksTypeDef *RCC_Clocks)
|
|
218 |
{
|
|
219 |
/* Get SYSCLK frequency */
|
|
220 |
RCC_Clocks->SYSCLK_Frequency = RCC_GetSystemClockFreq();
|
|
221 |
|
|
222 |
/* HCLK clock frequency */
|
|
223 |
RCC_Clocks->HCLK_Frequency = RCC_GetHCLKClockFreq(RCC_Clocks->SYSCLK_Frequency);
|
|
224 |
|
|
225 |
/* PCLK1 clock frequency */
|
|
226 |
RCC_Clocks->PCLK1_Frequency = RCC_GetPCLK1ClockFreq(RCC_Clocks->HCLK_Frequency);
|
|
227 |
}
|
|
228 |
|
|
229 |
/**
|
|
230 |
* @brief Return USARTx clock frequency
|
|
231 |
* @param USARTxSource This parameter can be one of the following values:
|
|
232 |
* @arg @ref LL_RCC_USART1_CLKSOURCE
|
|
233 |
* @arg @ref LL_RCC_USART2_CLKSOURCE (*)
|
|
234 |
* @arg @ref LL_RCC_USART3_CLKSOURCE (*)
|
|
235 |
*
|
|
236 |
* (*) value not defined in all devices.
|
|
237 |
* @retval USART clock frequency (in Hz)
|
|
238 |
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
|
|
239 |
*/
|
|
240 |
uint32_t LL_RCC_GetUSARTClockFreq(uint32_t USARTxSource)
|
|
241 |
{
|
|
242 |
uint32_t usart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
|
|
243 |
|
|
244 |
/* Check parameter */
|
|
245 |
assert_param(IS_LL_RCC_USART_CLKSOURCE(USARTxSource));
|
|
246 |
#if defined(RCC_CFGR3_USART1SW)
|
|
247 |
if (USARTxSource == LL_RCC_USART1_CLKSOURCE)
|
|
248 |
{
|
|
249 |
/* USART1CLK clock frequency */
|
|
250 |
switch (LL_RCC_GetUSARTClockSource(USARTxSource))
|
|
251 |
{
|
|
252 |
case LL_RCC_USART1_CLKSOURCE_SYSCLK: /* USART1 Clock is System Clock */
|
|
253 |
usart_frequency = RCC_GetSystemClockFreq();
|
|
254 |
break;
|
|
255 |
|
|
256 |
case LL_RCC_USART1_CLKSOURCE_HSI: /* USART1 Clock is HSI Osc. */
|
|
257 |
if (LL_RCC_HSI_IsReady())
|
|
258 |
{
|
|
259 |
usart_frequency = HSI_VALUE;
|
|
260 |
}
|
|
261 |
break;
|
|
262 |
|
|
263 |
case LL_RCC_USART1_CLKSOURCE_LSE: /* USART1 Clock is LSE Osc. */
|
|
264 |
if (LL_RCC_LSE_IsReady())
|
|
265 |
{
|
|
266 |
usart_frequency = LSE_VALUE;
|
|
267 |
}
|
|
268 |
break;
|
|
269 |
|
|
270 |
case LL_RCC_USART1_CLKSOURCE_PCLK1: /* USART1 Clock is PCLK1 */
|
|
271 |
default:
|
|
272 |
usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
|
|
273 |
break;
|
|
274 |
}
|
|
275 |
}
|
|
276 |
#endif /* RCC_CFGR3_USART1SW */
|
|
277 |
|
|
278 |
#if defined(RCC_CFGR3_USART2SW)
|
|
279 |
if (USARTxSource == LL_RCC_USART2_CLKSOURCE)
|
|
280 |
{
|
|
281 |
/* USART2CLK clock frequency */
|
|
282 |
switch (LL_RCC_GetUSARTClockSource(USARTxSource))
|
|
283 |
{
|
|
284 |
case LL_RCC_USART2_CLKSOURCE_SYSCLK: /* USART2 Clock is System Clock */
|
|
285 |
usart_frequency = RCC_GetSystemClockFreq();
|
|
286 |
break;
|
|
287 |
|
|
288 |
case LL_RCC_USART2_CLKSOURCE_HSI: /* USART2 Clock is HSI Osc. */
|
|
289 |
if (LL_RCC_HSI_IsReady())
|
|
290 |
{
|
|
291 |
usart_frequency = HSI_VALUE;
|
|
292 |
}
|
|
293 |
break;
|
|
294 |
|
|
295 |
case LL_RCC_USART2_CLKSOURCE_LSE: /* USART2 Clock is LSE Osc. */
|
|
296 |
if (LL_RCC_LSE_IsReady())
|
|
297 |
{
|
|
298 |
usart_frequency = LSE_VALUE;
|
|
299 |
}
|
|
300 |
break;
|
|
301 |
|
|
302 |
case LL_RCC_USART2_CLKSOURCE_PCLK1: /* USART2 Clock is PCLK1 */
|
|
303 |
default:
|
|
304 |
usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
|
|
305 |
break;
|
|
306 |
}
|
|
307 |
}
|
|
308 |
#endif /* RCC_CFGR3_USART2SW */
|
|
309 |
|
|
310 |
#if defined(RCC_CFGR3_USART3SW)
|
|
311 |
if (USARTxSource == LL_RCC_USART3_CLKSOURCE)
|
|
312 |
{
|
|
313 |
/* USART3CLK clock frequency */
|
|
314 |
switch (LL_RCC_GetUSARTClockSource(USARTxSource))
|
|
315 |
{
|
|
316 |
case LL_RCC_USART3_CLKSOURCE_SYSCLK: /* USART3 Clock is System Clock */
|
|
317 |
usart_frequency = RCC_GetSystemClockFreq();
|
|
318 |
break;
|
|
319 |
|
|
320 |
case LL_RCC_USART3_CLKSOURCE_HSI: /* USART3 Clock is HSI Osc. */
|
|
321 |
if (LL_RCC_HSI_IsReady())
|
|
322 |
{
|
|
323 |
usart_frequency = HSI_VALUE;
|
|
324 |
}
|
|
325 |
break;
|
|
326 |
|
|
327 |
case LL_RCC_USART3_CLKSOURCE_LSE: /* USART3 Clock is LSE Osc. */
|
|
328 |
if (LL_RCC_LSE_IsReady())
|
|
329 |
{
|
|
330 |
usart_frequency = LSE_VALUE;
|
|
331 |
}
|
|
332 |
break;
|
|
333 |
|
|
334 |
case LL_RCC_USART3_CLKSOURCE_PCLK1: /* USART3 Clock is PCLK1 */
|
|
335 |
default:
|
|
336 |
usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
|
|
337 |
break;
|
|
338 |
}
|
|
339 |
}
|
|
340 |
|
|
341 |
#endif /* RCC_CFGR3_USART3SW */
|
|
342 |
return usart_frequency;
|
|
343 |
}
|
|
344 |
|
|
345 |
/**
|
|
346 |
* @brief Return I2Cx clock frequency
|
|
347 |
* @param I2CxSource This parameter can be one of the following values:
|
|
348 |
* @arg @ref LL_RCC_I2C1_CLKSOURCE
|
|
349 |
* @retval I2C clock frequency (in Hz)
|
|
350 |
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that HSI oscillator is not ready
|
|
351 |
*/
|
|
352 |
uint32_t LL_RCC_GetI2CClockFreq(uint32_t I2CxSource)
|
|
353 |
{
|
|
354 |
uint32_t i2c_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
|
|
355 |
|
|
356 |
/* Check parameter */
|
|
357 |
assert_param(IS_LL_RCC_I2C_CLKSOURCE(I2CxSource));
|
|
358 |
|
|
359 |
/* I2C1 CLK clock frequency */
|
|
360 |
if (I2CxSource == LL_RCC_I2C1_CLKSOURCE)
|
|
361 |
{
|
|
362 |
switch (LL_RCC_GetI2CClockSource(I2CxSource))
|
|
363 |
{
|
|
364 |
case LL_RCC_I2C1_CLKSOURCE_SYSCLK: /* I2C1 Clock is System Clock */
|
|
365 |
i2c_frequency = RCC_GetSystemClockFreq();
|
|
366 |
break;
|
|
367 |
|
|
368 |
case LL_RCC_I2C1_CLKSOURCE_HSI: /* I2C1 Clock is HSI Osc. */
|
|
369 |
default:
|
|
370 |
if (LL_RCC_HSI_IsReady())
|
|
371 |
{
|
|
372 |
i2c_frequency = HSI_VALUE;
|
|
373 |
}
|
|
374 |
break;
|
|
375 |
}
|
|
376 |
}
|
|
377 |
|
|
378 |
return i2c_frequency;
|
|
379 |
}
|
|
380 |
|
|
381 |
#if defined(USB)
|
|
382 |
/**
|
|
383 |
* @brief Return USBx clock frequency
|
|
384 |
* @param USBxSource This parameter can be one of the following values:
|
|
385 |
* @arg @ref LL_RCC_USB_CLKSOURCE
|
|
386 |
* @retval USB clock frequency (in Hz)
|
|
387 |
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI48) or PLL is not ready
|
|
388 |
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected
|
|
389 |
*/
|
|
390 |
uint32_t LL_RCC_GetUSBClockFreq(uint32_t USBxSource)
|
|
391 |
{
|
|
392 |
uint32_t usb_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
|
|
393 |
|
|
394 |
/* Check parameter */
|
|
395 |
assert_param(IS_LL_RCC_USB_CLKSOURCE(USBxSource));
|
|
396 |
|
|
397 |
/* USBCLK clock frequency */
|
|
398 |
switch (LL_RCC_GetUSBClockSource(USBxSource))
|
|
399 |
{
|
|
400 |
case LL_RCC_USB_CLKSOURCE_PLL: /* PLL clock used as USB clock source */
|
|
401 |
if (LL_RCC_PLL_IsReady())
|
|
402 |
{
|
|
403 |
usb_frequency = RCC_PLL_GetFreqDomain_SYS();
|
|
404 |
}
|
|
405 |
break;
|
|
406 |
|
|
407 |
#if defined(RCC_CFGR3_USBSW_HSI48)
|
|
408 |
case LL_RCC_USB_CLKSOURCE_HSI48: /* HSI48 clock used as USB clock source */
|
|
409 |
default:
|
|
410 |
if (LL_RCC_HSI48_IsReady())
|
|
411 |
{
|
|
412 |
usb_frequency = HSI48_VALUE;
|
|
413 |
}
|
|
414 |
break;
|
|
415 |
#else
|
|
416 |
case LL_RCC_USB_CLKSOURCE_NONE: /* No clock used as USB clock source */
|
|
417 |
default:
|
|
418 |
usb_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
|
|
419 |
break;
|
|
420 |
#endif /* RCC_CFGR3_USBSW_HSI48 */
|
|
421 |
}
|
|
422 |
|
|
423 |
return usb_frequency;
|
|
424 |
}
|
|
425 |
#endif /* USB */
|
|
426 |
|
|
427 |
#if defined(CEC)
|
|
428 |
/**
|
|
429 |
* @brief Return CECx clock frequency
|
|
430 |
* @param CECxSource This parameter can be one of the following values:
|
|
431 |
* @arg @ref LL_RCC_CEC_CLKSOURCE
|
|
432 |
* @retval CEC clock frequency (in Hz)
|
|
433 |
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillators (HSI or LSE) are not ready
|
|
434 |
*/
|
|
435 |
uint32_t LL_RCC_GetCECClockFreq(uint32_t CECxSource)
|
|
436 |
{
|
|
437 |
uint32_t cec_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
|
|
438 |
|
|
439 |
/* Check parameter */
|
|
440 |
assert_param(IS_LL_RCC_CEC_CLKSOURCE(CECxSource));
|
|
441 |
|
|
442 |
/* CECCLK clock frequency */
|
|
443 |
switch (LL_RCC_GetCECClockSource(CECxSource))
|
|
444 |
{
|
|
445 |
case LL_RCC_CEC_CLKSOURCE_HSI_DIV244: /* HSI / 244 clock used as CEC clock source */
|
|
446 |
if (LL_RCC_HSI_IsReady())
|
|
447 |
{
|
|
448 |
cec_frequency = HSI_VALUE / 244U;
|
|
449 |
}
|
|
450 |
break;
|
|
451 |
|
|
452 |
case LL_RCC_CEC_CLKSOURCE_LSE: /* LSE clock used as CEC clock source */
|
|
453 |
default:
|
|
454 |
if (LL_RCC_LSE_IsReady())
|
|
455 |
{
|
|
456 |
cec_frequency = LSE_VALUE;
|
|
457 |
}
|
|
458 |
break;
|
|
459 |
}
|
|
460 |
|
|
461 |
return cec_frequency;
|
|
462 |
}
|
|
463 |
#endif /* CEC */
|
|
464 |
|
|
465 |
/**
|
|
466 |
* @}
|
|
467 |
*/
|
|
468 |
|
|
469 |
/**
|
|
470 |
* @}
|
|
471 |
*/
|
|
472 |
|
|
473 |
/** @addtogroup RCC_LL_Private_Functions
|
|
474 |
* @{
|
|
475 |
*/
|
|
476 |
|
|
477 |
/**
|
|
478 |
* @brief Return SYSTEM clock frequency
|
|
479 |
* @retval SYSTEM clock frequency (in Hz)
|
|
480 |
*/
|
|
481 |
uint32_t RCC_GetSystemClockFreq(void)
|
|
482 |
{
|
|
483 |
uint32_t frequency = 0U;
|
|
484 |
|
|
485 |
/* Get SYSCLK source -------------------------------------------------------*/
|
|
486 |
switch (LL_RCC_GetSysClkSource())
|
|
487 |
{
|
|
488 |
case LL_RCC_SYS_CLKSOURCE_STATUS_HSI: /* HSI used as system clock source */
|
|
489 |
frequency = HSI_VALUE;
|
|
490 |
break;
|
|
491 |
|
|
492 |
case LL_RCC_SYS_CLKSOURCE_STATUS_HSE: /* HSE used as system clock source */
|
|
493 |
frequency = HSE_VALUE;
|
|
494 |
break;
|
|
495 |
|
|
496 |
case LL_RCC_SYS_CLKSOURCE_STATUS_PLL: /* PLL used as system clock source */
|
|
497 |
frequency = RCC_PLL_GetFreqDomain_SYS();
|
|
498 |
break;
|
|
499 |
|
|
500 |
#if defined(RCC_HSI48_SUPPORT)
|
|
501 |
case LL_RCC_SYS_CLKSOURCE_STATUS_HSI48:/* HSI48 used as system clock source */
|
|
502 |
frequency = HSI48_VALUE;
|
|
503 |
break;
|
|
504 |
#endif /* RCC_HSI48_SUPPORT */
|
|
505 |
|
|
506 |
default:
|
|
507 |
frequency = HSI_VALUE;
|
|
508 |
break;
|
|
509 |
}
|
|
510 |
|
|
511 |
return frequency;
|
|
512 |
}
|
|
513 |
|
|
514 |
/**
|
|
515 |
* @brief Return HCLK clock frequency
|
|
516 |
* @param SYSCLK_Frequency SYSCLK clock frequency
|
|
517 |
* @retval HCLK clock frequency (in Hz)
|
|
518 |
*/
|
|
519 |
uint32_t RCC_GetHCLKClockFreq(uint32_t SYSCLK_Frequency)
|
|
520 |
{
|
|
521 |
/* HCLK clock frequency */
|
|
522 |
return __LL_RCC_CALC_HCLK_FREQ(SYSCLK_Frequency, LL_RCC_GetAHBPrescaler());
|
|
523 |
}
|
|
524 |
|
|
525 |
/**
|
|
526 |
* @brief Return PCLK1 clock frequency
|
|
527 |
* @param HCLK_Frequency HCLK clock frequency
|
|
528 |
* @retval PCLK1 clock frequency (in Hz)
|
|
529 |
*/
|
|
530 |
uint32_t RCC_GetPCLK1ClockFreq(uint32_t HCLK_Frequency)
|
|
531 |
{
|
|
532 |
/* PCLK1 clock frequency */
|
|
533 |
return __LL_RCC_CALC_PCLK1_FREQ(HCLK_Frequency, LL_RCC_GetAPB1Prescaler());
|
|
534 |
}
|
|
535 |
/**
|
|
536 |
* @brief Return PLL clock frequency used for system domain
|
|
537 |
* @retval PLL clock frequency (in Hz)
|
|
538 |
*/
|
|
539 |
uint32_t RCC_PLL_GetFreqDomain_SYS(void)
|
|
540 |
{
|
|
541 |
uint32_t pllinputfreq = 0U, pllsource = 0U;
|
|
542 |
|
|
543 |
/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL divider) * PLL Multiplicator */
|
|
544 |
|
|
545 |
/* Get PLL source */
|
|
546 |
pllsource = LL_RCC_PLL_GetMainSource();
|
|
547 |
|
|
548 |
switch (pllsource)
|
|
549 |
{
|
|
550 |
#if defined(RCC_PLLSRC_PREDIV1_SUPPORT)
|
|
551 |
case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */
|
|
552 |
pllinputfreq = HSI_VALUE;
|
|
553 |
#else
|
|
554 |
case LL_RCC_PLLSOURCE_HSI_DIV_2: /* HSI used as PLL clock source */
|
|
555 |
pllinputfreq = HSI_VALUE / 2U;
|
|
556 |
#endif /* RCC_PLLSRC_PREDIV1_SUPPORT */
|
|
557 |
break;
|
|
558 |
|
|
559 |
#if defined(RCC_HSI48_SUPPORT)
|
|
560 |
case LL_RCC_PLLSOURCE_HSI48: /* HSI48 used as PLL clock source */
|
|
561 |
pllinputfreq = HSI48_VALUE;
|
|
562 |
break;
|
|
563 |
#endif /* RCC_HSI48_SUPPORT */
|
|
564 |
|
|
565 |
case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */
|
|
566 |
pllinputfreq = HSE_VALUE;
|
|
567 |
break;
|
|
568 |
|
|
569 |
default:
|
|
570 |
#if defined(RCC_PLLSRC_PREDIV1_SUPPORT)
|
|
571 |
pllinputfreq = HSI_VALUE;
|
|
572 |
#else
|
|
573 |
pllinputfreq = HSI_VALUE / 2U;
|
|
574 |
#endif /* RCC_PLLSRC_PREDIV1_SUPPORT */
|
|
575 |
break;
|
|
576 |
}
|
|
577 |
#if defined(RCC_PLLSRC_PREDIV1_SUPPORT)
|
|
578 |
return __LL_RCC_CALC_PLLCLK_FREQ(pllinputfreq, LL_RCC_PLL_GetMultiplicator(), LL_RCC_PLL_GetPrediv());
|
|
579 |
#else
|
|
580 |
return __LL_RCC_CALC_PLLCLK_FREQ((pllinputfreq / (LL_RCC_PLL_GetPrediv() + 1U)), LL_RCC_PLL_GetMultiplicator());
|
|
581 |
#endif /* RCC_PLLSRC_PREDIV1_SUPPORT */
|
|
582 |
}
|
|
583 |
/**
|
|
584 |
* @}
|
|
585 |
*/
|
|
586 |
|
|
587 |
/**
|
|
588 |
* @}
|
|
589 |
*/
|
|
590 |
|
|
591 |
#endif /* defined(RCC) */
|
|
592 |
|
|
593 |
/**
|
|
594 |
* @}
|
|
595 |
*/
|
|
596 |
|
|
597 |
#endif /* USE_FULL_LL_DRIVER */
|
|
598 |
|
|
599 |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|